Impact of Current Load on Mine Trailing Cable Thermal Life

Details

• Personal Author:
  Kovalchik, Peter G. ; Yenchek, Michael R.
• Description:
  The U.S. Bureau of Mines has determined a method for calculating coal mine portable power cable thermal life for a specified temperature loading. This work was the culmination of a multifaceted research project involving (1) accelerated life tests of insulation and jacket materials and (2) steady-state and cyclical loading of cables. Composite arrhenius curves were derived for common insulation and jacket materials to identify the key cable quality that precipitates thermal failure. Plots of temperature rise versus current for popular cable sizes were then referenced to develop a correspondence between cable life, based upon thermal degradation, and current loading. Predictions of cable thermal life were made through integration over variable load cycles and, consequently, variable operating temperatures. This procedure may have utility for both the U.S. Mine Safety and Health Administration and mining machine designers in determining the appropriate cable size for new equipment. [Description provided by NIOSH]
• Subjects:
  • Electricity
  • Mining
  • Occupational Health
  • Safety
• Keywords:
  • Electrical-insulation; Electric-currents; Portable-equipment; Power-lines; Insulated-conductors; Load-impedance; Thermal-degradation; Loading; Mining-equipment; Service-life; Electric-wire
• Series:
  Mining Publications
• Subseries:
  Information Circular
• Document Type:
  Text
• Genre:
  Conference Publications ; Pamphlet or Booklet
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRC - Pittsburgh Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-11
• NIOSHTIC Number:
  nn:10008582
• NTIS Accession Number:
  PB92-177641
• Citation:
  Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC 9278, 1991 Jan; :1-11
• Federal Fiscal Year:
  1991
• Peer Reviewed:
  False
• Source Full Name:
  Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC 9278
• Download URL:
  https://stacks.cdc.gov/view/cdc/235873/cdc_235873_DS1.pdf
• File Type:
  [PDF - 605.86 KB]
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:cb5252621ac355d5dcbbbffe4bca8d119bf66cacc810485dc2ea643145c8a1782794d37cae8217760ed0f42219ffbe5223d16bfc0ec6075b1f3eb4d70ecb64ca